公开(公告)号：US5287171A

公开(公告)日：1994-02-15

申请号：US783995

申请日：1991-10-29

申请人： Hiroyasu Ohtsubo ,  Kazuhiro Koshio

发明人： Hiroyasu Ohtsubo ,  Kazuhiro Koshio

IPC分类号： H04N5/06 ,  H04N5/225 ,  H04N5/335 ,  H04N5/372 ,  H04N9/04 ,  H04N9/077

CPC分类号： H04N5/06 ,  H04N5/335 ,  H04N9/04 ,  H04N9/045 ,  H04N2209/046

摘要： A video camera in which an output signal from a solid-state image sensor is converted into a corresponding digital signal at a horizontal reading cycle of the output signal, and the digital signal is digital-processed with a first predetermined clock (fs) synchronous with the reading cycle to provide a luminance signal and a color difference signal. This video camera comprises data clock converter circuit for latching the color difference signals generated in synchronism with the first clock with a data latch clock synchronous with a second clock (4 fsc) to thereby convert the clock for the color difference signal; a control circuit for detecting the phase of the changing point of the color difference signal to provide a phase detecting signal and supply said data latch clock with which color deference signal is latched synchronously with said second clock (4 fsc) at a stable point after the changing point of the color difference signal generated in synchronism with the first clock (fs); a phase correction circuit for receiving the color difference signal from said data clock converter circuit and producing a phase-corrected color difference signal; and a modulation circuit for quadrature-balance-modulating the color difference signal supplied from said phase correction circuit to provide a modulated color signal.

摘要翻译： 一种视频摄像机，其中来自固态图像传感器的输出信号在输出信号的水平读取周期被转换成相应的数字信号，数字信号以与第一预定时钟（fs）同步的数字处理 提供亮度信号和色差信号的读取周期。 该摄像机包括数据时钟转换器电路，用于将与第一时钟同步产生的色差信号与第二时钟（4fsc）同步的数据锁存时钟锁存，从而转换色差信号的时钟; 用于检测所述色差信号的变化点的相位以提供相位检测信号的控制电路，并且在所述第二时钟（4fsc）之后的稳定点处提供与所述第二时钟（4fsc）同步地锁存了所述颜色校正信号的所述数据锁存时钟 与第一时钟（fs）同步产生的色差信号的变化点; 相位校正电路，用于从所述数据时钟转换器电路接收色差信号并产生相位校正的色差信号; 以及用于对从所述相位校正电路提供的色差信号进行正交平衡调制以提供调制色信号的调制电路。